Separable fastener



F.S.CARR.

SEPARABLE FASTENER.

'APPLICATION' FILED IAN. 16,. I920.

Patnted Aug. 9, 1921.

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FRED S. CARE, OF NEVVTQN, MASSACHUSETTS ASSIGNOR T0 CARR FASTENEB, COMPANY; OF CAMBRIDGE, lv'IASSACI-EUSETTS, A GOBEOBATION OF MAINE.

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T 0 all whom it may concern:

Be it known that I, FRED S. CARR, a citizen of the United States, and a resident of Newton, in the county of. Middlesex, Commonwealth of Massachusetts, have invented an Improvement in 'Separable Fasteners, of which the following descriptiom in connection with the accompanying drawings, is a V specification, like characters on the drawmgs representing like parts.

This-invention pertains to improvements in separable fasteners, and more particularly, though not exclusively, to separable fasteners for use in securing automobile curtains andthe like. One of the purposes of the invention is to provide a fastener of simple construction having great holding power, in'which the stud andsocket can be readily separated without complex manipulation.

In the drawings, which show a preferred construction of one illustrative embodiment of my invention Figure l is a front elevation of a portion of a curtain having a preferred form of fastener secured thereto;

Fig. 2 is a section, partly in elevation, on the line 22 of Fig.1.;

Fig. 3 is a rear View of a socket member taken from the back of a curtain;

Fig. 4 is a section on the line 4-4 of Fig. 2; and V Fig. 5 is a side elevation of the attaching part "of the socket member prior to assembly.

Referring to the drawings and to the preferred form of my invention selected for illustrative purposes, I have shown a fase tener including a resilient stud having a head 5, a neck 6 and a secondary neck 7, said stud being rendered resilient preferably in the manner shown in my copending application filed herewith, Serial No. 351,773, being slit longitudinally, the slots PI'QfGT'. ably extending into the base of the stud as shown in said application. The preferred form of stud preferably coiiperates with a socket, which may be and preferably is com prised of two parts, including'a socket part 8 providing a stud-receiving aperture and preferably having at one side thereof a rearwardly extending lip 9 which is preferably curved in cross-section to embrace a portion of the stud, preferably approximately onehalf, as .best shown in Fig. 3, and which Specification of Letters Patent. p m t i 9, 1921,

Application filed January 16, 1920. Serial No. 351,774.

preferably provides a jaw part 10 for engag-ement with the secondary neck 7 of the stud. preferably includes means for turning, clenching and engaging any suitable'prongs 11 which preferably project rearwardly from a socket-securing plate 12 located on the opposite side of the socketcarrying fabric 13 from the socket 8. The before described securing construction, providing prong-turning and engaging parts in asin gle piece, is of use in many connections, but is particularly useful in connection with the securing of sockets, especially sockets of the The preferred form of socket also three-side lock type herein described. By this.

construction the number of parts used is re-' duced to a "minimum and the ends of the securing prongs are concealed. It is obvi ous that for some purposes the concealing of the ends of the prongs is not essential and that this feature of my invention may be dispensed with whileavailingof other advantages thereof.

The aperturein the socket for receiving the stud is preferably annular and slightly smaller than the majon diameter of the head of the stud, so that when the stud is who entered in the socket, the resilient portions of the studima'y spring together to reduce the effective diameter of the head, the resiliency being such that when the parts have reached the position shown in F 2, thestud'will expand, preferably providing, howevensomeslight compression of the stud so that the parts will not rattle. That portionof the stud adjacent the neck 6 will have v greater capacity for resilient movement than i that portion ofthe stud adjacent the se's- 'ondary neck 'Z, because the secondary neck 7 is nearer the base of resiliency than the neck 6. lhe shoulder between the neck 6 of the stud and thehead 5 thereof. is preferably somewhat vsloping, as shown. When the socket is tipped relative to thestud in the direction indicated by the arrow, in Fig. 2, the head of the stud will be compressed somewhat'and the socket will tip about that portion of the margin of the aperture which is" directly above the stud and which engages the neck 6. The jaw 10 will, therefore, be withdrawn from these'condary neck 7 and as the stud is tipped further, the head of the stud will be readily withdrawn from the stud-receiving aperture. Separation of stud and socket by relative rectilinear movement is prevented by the jaw 10 engaging the sec ondary neck 7 because the stud has not sufficient resiliency adjacent the neck 7 to permit the jaw 10 to clear the projection in front of the neck 7 except by the tipping movement before described. ping movement of stud and socket in any di rection exrcpt that indicated by the arrow in Fig. 2 is precluded by reason of the fact that the lip or flange 9 extends around the sides of the stud. The aw 10 preferably enga a somewhat smaller proportion of the circumference of the stud than does the lip 9. so that during the stud and socket disengaging tipping movement, the lip 10 will exert little, any, compressive force against the sides of the stud adjacent the secondary neck 7.

It will be understood that I use the word fabric in its broader sense to include not only. woven materials, but any flexible carrying medium. 7

While I have shown and described a preferred form of one embodiment of my invention, it will be understood that changes involving omission, substitution, alteration and reversal of parts, and even changes in v the mode of operation, may be made without departing from the scope of my invention,

. which is best defined in the following claims.

Claims:

1. An element for separable fasteners comprising, in combination, a pronged mem her for attachment to one side of a flexible carrier and a single part for attachment to the opposite side of the flexible carrier, said integral part providing integral anvil portions for turning the prongs of the pronged member and integral holding portions engaging the turned prongs.

2. An element for separable fasteners comprising, in combination, a pronged memher for attachment to one side of a flexible carrier and a singlepart for attachment to the opposite side of the flexible carrier, said integral part providing integral anvil portions for turning inwardly the prongs of the pronged member and integral holding portions engaging the turned prongs.

3. A socket for separable fasteners and means for securing the same to a flexible carrier comprising, in combination, a front part having rearwardly projecting prongs, said part for attachment to one side of the flexible carrier with the prongs projecting therethrough, and supplemental means for attachment to the other side of the flexible carrier, said supplemental part having a stud-receiving aperture therein Sand providing means for turning said prongs and Relative tipfor holding said front part and supplemental part together.

l. A. socket for separable fasteners and means for securing the same to a flexible car rier comprising, in combination, a front part having rearwardly projecting prongs, said 5. A socket for separable fasteners com-' prising, in combination, a plate having an opening therethrough for the reception of the head of a stud, said plate providing boss means for turning prongs, and having flanged portions with apertures through which the prongs may pass adjacent said boss means.

6. A socket for separable fasteners com prising, in combination. a plate havingan opening therethrough for the reception of the head of a stud, said plate providing bossmeans for turning prongs, and having flan ed portions with apertures through which the prongs may pass adjacent said boss means, said plate also providing a rearwardly projecting lip for engagement with the shank of the cooperating stud.

7. A socket for separable fasteners comprising in combination, a plate having an opening therethrough for the reception of the head of a stud, said plate providing boss means for turning prongs, and having flanged portions with apertures through vhich the prongs may pass adjacent said boss means, said plate also providing a rearwardly projecting lip for engagement with the shank of the cooperating stud,said lip having jaw means projecting therefrom a substantial distance rearwardly of. said opening. 1

8. A three-side lock fastener comprising, in combination, a resilient stud'and a rigid socket, said socket comprising two pieces only, the one a socket proper for'engaging the stud on that side of the flexible socketcarrying fabric from which the stud enters, and the other a prong-carrying part having prongs for projecting through the carry- FRED S. CARR. 

